Bulgaria has evidence implicating Hezbollah's military wing in a bomb attack which claimed six lives at an airport in the country's coastal city of Burgas in July, the interior ministry in Sofia said.
"One can reasonably assume that two people linked to the terrorist attack at the Sarafovo airport belonged to the military wing of Hezbollah," interior minister Tsvetan Tsvetanov said.
The blast in a bus full of tourists who had arrived on a plane from Israel killed five Israeli nationals, the Bulgarian bus driver, and the suspected bomber, a pale-skinned man wearing a baseball cap.
Tsvetanov said one of the suspects entered Bulgaria with a Canadian passport, and another with an Australian one. The two persons, whose identity has been established, had previously resided in Lebanon.
The Bulgarian government hopes for Lebanon's cooperation in the investigation, Tsvetanov added.